Abstract:
BACKGROUND:Investigations of breast cancer among men may provide clues for environmental and occupational risk factors that may be difficult to study in women, because of confounding or effect modification from reproductive female characteristics. The objective was to estimate occupation-specific risks of male breast cancer and to assess the effect of occupational exposure to extremely low-frequency magnetic fields (ELFMF). METHODS:Standardized incidence ratios were computed for the period 1971-1989 among Swedish men who were 25-59 years of age at start of follow-up and gainfully employed in 1970. Log-linear Poisson models were fitted to adjust for geographical area. A job exposure matrix was used to classify occupational ELFMF exposure. RESULTS:A marked and consistent excess risk was found for machinery repairers. Increased relative risks based on few cases were also noted for librarians/archivists/curators, bank employees, non-specified clerical workers, metal processing workers, tanners/fur dressers, policemen, and custom surveillance officials. The relative risk among subjects with an estimated ELFMF exposure above the first quartile (0.12 microT) was 1.31 (95% confidence interval = 0.94-1.81), without a clear exposure-response pattern. Indications of an exposure-response relationship were found in workers with intermittent ELFMF exposure. CONCLUSIONS:The findings give no clear evidence for an etiological role of ELFMF in the development of breast cancer in men, but suggest that large variations in exposure over the work-day may be associated with an increased risk.
journal_name
Am J Ind Medjournal_title
American journal of industrial medicineauthors
Pollán M,Gustavsson P,Floderus Bdoi
10.1002/1097-0274(200103)39:3<276::aid-ajim1015>3.subject
Has Abstractpub_date
2001-03-01 00:00:00pages
276-85issue
3eissn
0271-3586issn
1097-0274pii
10.1002/1097-0274(200103)39:3<276::AID-AJIM1015>3.journal_volume
39pub_type
杂志文章abstract:BACKGROUND:The impact of long working hours on health has been of major concern since the late 19th Century. Working hours are again increasing in the US. METHODS:An overview of historical, sociological, and health-related research presented at an international conference on long working hours is discussed as an intro...
journal_title:American journal of industrial medicine
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